obstinacy

noun

1. (countable, uncountable)The state, or an act, of stubbornness or doggedness.

   “He finished only through a mixture of determined obstinacy and ingenuity.”

   “"I don't know where," replied the girl. "Then I do," said Sikes, more in the spirit of obstinacy than because he had any real objection.”

   “1877, Leo Tolstoy (author), David Magarshack (translator), Anna Karenina, part 6, ch 12, His hand closed, he drew back, and his face assumed a still more stubborn expression. "For you it's a matter of obstinacy," she said, looking intently at him and suddenly finding the right word for the expression of his face which exasperated her so much.”

2. (collective, countable)A group of bison; the collective noun for bison.